220=209-y

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Solution for 220=209-y equation:


Simplifying
220 = 209 + -1y

Solving
220 = 209 + -1y

Solving for variable 'y'.

Move all terms containing y to the left, all other terms to the right.

Add 'y' to each side of the equation.
220 + y = 209 + -1y + y

Combine like terms: -1y + y = 0
220 + y = 209 + 0
220 + y = 209

Add '-220' to each side of the equation.
220 + -220 + y = 209 + -220

Combine like terms: 220 + -220 = 0
0 + y = 209 + -220
y = 209 + -220

Combine like terms: 209 + -220 = -11
y = -11

Simplifying
y = -11

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